#!/usr/bin/python

# Copyright (c) 2009, Purdue University
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 
# Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright notice, this
# list of conditions and the following disclaimer in the documentation and/or
# other materials provided with the distribution.
# 
# Neither the name of the Purdue University nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

"""Make host tool for dnsmanagement"""


__copyright__ = 'Copyright (C) 2009, Purdue University'
__license__ = 'BSD'
__version__ = '0.5'


import os
import sys
import getpass

from optparse import OptionParser

from roster_user_tools import cli_record_lib
from roster_user_tools import cli_common_lib
from roster_user_tools import roster_client_lib


def main(args):
  """Collects command line arguments, checks ip addresses and adds records.

  Inputs:
    args: list of arguments from the command line
  """
  parser = OptionParser()

  parser.add_option('-i', '--ip-address', action='store', dest='ip_address',
                    help='IP address of machine.', metavar='<ip-address>',
                    default=None)
  parser.add_option('-r', '--range', action='store', dest='range',
                    help='CIDR block range of IP addresses. Assumes -l, will'
                    'only print a list of ip addresses. Example:'
                    '10.10.0.0/24', metavar='<range>', default=None)
  parser.add_option('-s', '--server', action='store', dest='server',
                    help='XML RPC Server address.', metavar='<server>',
                    default='https://localhost:8000')
  parser.add_option('-t', '--target', action='store', dest='target',
                    help='Target machine host name.', metavar='<target>',
                    default=None)
  parser.add_option('-l', '--list', action='store_true', dest='list_data',
                    help='Set this flag to only list DNS configuration without'
                         ' making any changes.', default=False)
  parser.add_option('--ttl', action='store', dest='ttl',
                    help='Time to live.', metavar='<ttl>', default=5)
  parser.add_option('-z', '--zone', action='store', dest='zone_name',
                    help='String of the zone name.', metavar='<zone-name>',
                    default=None)
  parser.add_option('-v', '--view-name', action='store', dest='view_name',
                    help=('String of the view name <view-name>. Example: '
                    '"internal"'), metavar='<view-name>', default='any')
  parser.add_option('-u', '--username', action='store', dest='username',
                    help='Run as a different username.', metavar='<username>',
                    default=unicode(getpass.getuser()))
  parser.add_option('-p', '--password', action='store', dest='password',
                    help='Password string, NOTE: It is insecure to use this '
                    'flag on the command line.', metavar='<password>',
                    default=None)
  parser.add_option('-c', '--cred-file', action='store', dest='credfile',
                    help='Location of credential file.', metavar='<cred-file>',
                    default=os.path.join(os.path.expanduser('~'), '.dnscred'))
  parser.add_option('-q', '--quiet', action='store_true', dest='quiet',
                    help='Suppress program output.', default=False)

  (globals()["options"], args) = parser.parse_args(args)

  cli_common_lib.CheckCredentials(options)

  if( options.ip_address is not None ):
    if( options.ip_address.find('.') != -1 ):
      version = 4
    elif( options.ip_address.find(':') != -1 ):
      version = 6
    else:
      cli_common_lib.DnsError('Incorrectly formatted IP address.', 1)

    if( options.list_data ):
      records_dict = roster_client_lib.RunFunction('ListRecordsByCIDRBlock',
                                                   options.username,
                                                   credfile=options.credfile,
                                                   server_name=options.server,
                                                   args=[options.ip_address],
                                                   kwargs={'view_name':
                                                       options.view_name})[
                                                           'core_return']
      ip_address_list = roster_client_lib.RunFunction(
          'CIDRExpand', options.username, credfile=options.credfile,
          server_name=options.server, args=[options.ip_address])['core_return']

      print cli_common_lib.PrintRecords(records_dict, ip_address_list)
    else:
      record_type = u'a'
      if( version == 6 ):
        record_type = u'aaaa'
      reverse_ip = roster_client_lib.RunFunction('ReverseIP',
                                                 options.username,
                                                 credfile=options.credfile,
                                                 server_name=options.server,
                                                 args=[options.ip_address])[
                                                     'core_return']
      zone_info = roster_client_lib.RunFunction(
          'ListZones', options.username, credfile=options.credfile,
          server_name=options.server,
          kwargs={'zone_name': options.zone_name,
                  'view_name': options.view_name})['core_return']
      zone_origin = zone_info[options.zone_name][options.view_name][
          'zone_origin'].rstrip('.')
      if( options.target.rstrip('.').endswith(zone_origin) ):
        cli_common_lib.DnsError('Hostname cannot end with domain name.', 1)

      reverse_zone_name = roster_client_lib.RunFunction(
          'ListZoneByIPAddress', options.username, credfile=options.credfile,
          server_name=options.server, args=[options.ip_address])['core_return']

      if( not reverse_zone_name ):
        cli_common_lib.DnsError('No reverse zone found for "%s"' % (
            options.ip_address), 1)

      cli_record_lib.MakeRecord(record_type, options,
                                {u'assignment_ip': options.ip_address},
                                quiet=options.quiet)
      hostname = options.target
      options.target = reverse_ip
      options.zone_name = reverse_zone_name
      cli_record_lib.MakeRecord(u'ptr', options,
                                {u'assignment_host': '%s.%s.' % (
                                    hostname, zone_origin)},
                                quiet=options.quiet)

  elif( options.range is not None ):
    records_dict = roster_client_lib.RunFunction('ListRecordsByCIDRBlock',
                                                 options.username,
                                                 credfile=options.credfile,
                                                 server_name=options.server,
                                                 args=[options.range],
                                                 kwargs={'view_name':
                                                     options.view_name})[
                                                     'core_return']
    ip_address_list = roster_client_lib.RunFunction('CIDRExpand',
                                                    options.username,
                                                    credfile=options.credfile,
                                                    server_name=options.server,
                                                    args=[options.range])[
                                                        'core_return']

    print cli_common_lib.PrintRecords(records_dict, ip_address_list)
  else:
    cli_common_lib.DnsError('An ip address or range must be specified.', 1)


if __name__ == "__main__":
    main(sys.argv[1:])
